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41.
Bryan S. Graham 《Econometrica : journal of the Econometric Society》2011,79(2):437-452
This paper shows that the semiparametric efficiency bound for a parameter identified by an unconditional moment restriction with data missing at random (MAR) coincides with that of a particular augmented moment condition problem. The augmented system consists of the inverse probability weighted (IPW) original moment restriction and an additional conditional moment restriction which exhausts all other implications of the MAR assumption. The paper also investigates the value of additional semiparametric restrictions on the conditional expectation function (CEF) of the original moment function given always observed covariates. In the program evaluation context, for example, such restrictions are implied by semiparametric models for the potential outcome CEFs given baseline covariates. The efficiency bound associated with this model is shown to also coincide with that of a particular moment condition problem. Some implications of these results for estimation are briefly discussed. 相似文献
42.
Bryan S. Graham 《Econometrica : journal of the Econometric Society》2008,76(3):643-660
This paper proposes a new method for identifying social interactions using conditional variance restrictions. The method provides a consistent estimate of the social multiplier when social interactions take the “linear‐in‐means” form (Manski (1993)). When social interactions are not of the linear‐in‐means form, the estimator, under certain conditions, continues to form the basis of a consistent test of the no social interactions null with correct large sample size. The methods are illustrated using data from the Tennessee class size reduction experiment Project STAR. The application suggests that differences in peer group quality were an important source of individual‐level variation in the academic achievement of Project STAR kindergarten students. 相似文献
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Aileen Wiglesworth PhD Bryan Kemp PhD Laura Mosqueda MD 《Journal of elder abuse & neglect》2013,25(3):207-230
ABSTRACT Among the many different professionals who work to address elder and dependent adult mistreatment, the clinical psychologist performs a function that is not well documented. The experiences of a clinical psychologist attached to a medical response team and an elder abuse forensic center provide insight into this complex and multifaceted role. Case examples from an elder abuse forensic center illustrate the breadth of referral questions that a clinical psychologist addresses. This information may be of use to those who would argue that these services be made widely available to elder abuse professionals such as social workers, public guardians, and those in the criminal justice system. The case studies also may be useful for training purposes. 相似文献
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The purpose of this study was to inform future Public Service Announcement (PSA) development by examining the potential effectiveness of different types of anti-driving under the influence (DUI) PSAs for persons with different characteristics. PSAs utilizing empathy, fear, and informational approaches were shown to persons recruited from psychology courses (n = 137) and individuals that were mandated to treatment following a DUI offense (n = 17). The empathy approach was perceived to be the most effective and evoked the most negative affect, followed by fear and informational approaches. Less experience with DUI, lower sensation seeking, higher motivation to change, and higher perception of dangerousness of DUI all emerged as good predictors of higher perceived effectiveness of anti-DUI PSAs. Gender differences in perceived effectiveness were examined for fear and empathy PSAs, with inconclusive findings. 相似文献
47.
OBJECTIVE: The objective of this study was to examine connections between university students' mental health and their knowledge and use of campus mental health services. PARTICIPANTS AND METHODS: In March 2001, a sample of undergraduate students (N = 266) completed a Web-based questionnaire, providing information related to their mental health, knowledge of mental health services, and use of those services. RESULTS: Students who were mentally distressed were more likely to know about and use services; however, some students who reported to be mentally distressed either did not know about services or knew about services but did not use them. Living off campus, identifying as male, and having fewer years in college were related to less knowledge of campus mental health services. In addition, female sex and number of years in college were predictive of higher service use. CONCLUSIONS: With the high prevalence rates and severity of mental health problems, university mental health providers must continue to make strategic efforts to disseminate knowledge about mental health services to all students. 相似文献
48.
Ethlyn A. Williams Rajnandini Pillai Bryan Deptula Kevin B. Lowe 《The Leadership Quarterly》2012,23(3):324-341
The current study examines leadership in the context of the 2008 presidential election. Longitudinal data were collected across three regions of the United States to yield 414 responses. Perceptions of crisis were positively related to attributed charisma but not perceptions of authentic leadership. Value congruence moderated the relationship between cynicism and attributed charisma for Obama (but not for McCain) and between cynicism and perceptions of authentic leadership for McCain (but not for Obama). Attributed charisma was found to have augmenting effects over authenticity in predicting voting behavior. The contributions made to the charismatic, authentic, and crisis leadership literatures are discussed and directions for future research presented. 相似文献
49.
To influence the number of children ever born to a woman, socioeconomic variables must operate through behavioral and biological mechanisms such as the age at marriage, the level of fertility in the absence of deliberate fertility control, and the level of control exerted to reduce fertility within marriage. In this paper, we propose a new measure of cumulative fertility which is standardized for the age-fecundity relationship and for exposure to the risk of conception associated with duration of marriage. A simple model of fertility behavior which incorporates some of the mechanisms through which socioeconomic factors may affect fertility is developed and applied to data from the United States to demonstrate the properties of alternative measures of family size. The results indicate that use of the new measure allows more precise estimates of socioeconomic fertility relationships than would be obtained with children ever born or by sample stratification. 相似文献
50.
Colleen M. Fisher Michael R. Woodford Rachel E. Gartner Paul R. Sterzing Bryan G. Victor 《Journal of homosexuality》2019,66(10):1345-1379
ABSTRACTUnderstanding the nature and consequences of LGBTQ microaggressions is critical to fostering equity and wellbeing among sexual and gender minorities. Yet little guidance is available for researchers seeking psychometrically robust measures of subtle LGBTQ slights, invalidations, and insults. To address this gap, we conducted a scoping review of multi-item quantitative measures that included at least one question addressing LGBTQ microaggressions. This article reports the study characteristics and psychometric properties of 27 original measures we identified and their subsequent adaptations. The article concludes with an assessment of strengths and limitations of LGBTQ microaggression measurement, highlighting aspects of measurement innovation on which future researchers can build. As microaggressions remain a powerful and underexplored mechanism of sexual and gender minority oppression, this review will help to both advance methodological quality in this critical research area and enhance our understanding of how microaggressions manifest in the lives of LGBTQ individuals. 相似文献